Anyway, if Vedder is the boy's name, it's wildly appropriate, even if having a third grader sing a song like "Dead & Bloated" is not appropriate.

The kid is obviously super pumped to get to join STP on stage, and he'll surely remember this experience for the rest of his life.

While emulating the late-Scott Weiland's baritone like Gutt does is off the table for Vedder, the kid clearly knows the song like the back of his hand. The words came easily, and despite the excitement of the moment, he didn't rush anything.

Gutt walked over to help Vedder with the bridge, but the boy nailed the transition anyway.

Later in the bridge Vedder seems to lose his wind a bit (he had been jumping up and down for about three minutes), Gutt took over again to deliver a line or two, then handed the mic right back.

The two traded lines at the end of the tune and Vedder gave a totally pro-sounding "thank you" as the final chords rang out.

"I was incredibly proud and honored that they chose and trusted in me," Gutt told iHeartRadio when asked how he felt when he first got the call to audition. "I came in at the end of their search. It was a process of us becoming comfortable with each other and getting to know each other," he continued. "It was just as much about relationships as what I can bring to the table. Things like that take time and are important."

The band is on tour now, celebrating the anniversary of its debut album, Core, on which "Dead & Bloated" is the opening track.

STP is also preparing to release a new self-titled full-length album March 16.